12215970 has 96 divisors (see below), whose sum is σ = 35026992. Its totient is φ = 2935296.

The previous prime is 12215947. The next prime is 12215971. The reversal of 12215970 is 7951221.

12215970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 8139609 + 4076361 = 2853^2 + 2019^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61912 + ... + 62108.

Almost surely, 2^12215970 is an apocalyptic number.

12215970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12215970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17513496).

12215970 is an abundant number, since it is smaller than the sum of its proper divisors (22811022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12215970 is a wasteful number, since it uses less digits than its factorization.

12215970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 12215970 is about 3495.1351905184. The cubic root of 12215970 is about 230.3081565722.

The spelling of 12215970 in words is "twelve million, two hundred fifteen thousand, nine hundred seventy".